package io.standard;

/**
 * @author mubei
 * @date 2021/12/3
 * @description
 */
public class InputAndOutput_ {

    public static void main(String[] args) {
        //System.in       public static final InputStream in = null;
        //class java.io.BufferedInputStream
        // 标准输入
        System.out.println(System.in.getClass());

        // System.out    public static final PrintStream out = null;
        // class java.io.PrintStream
        // 标准输出流
        System.out.println(System.out.getClass());
    }
}
